If the inside of the stem and inside shanks are rough and not smooth, turbulence will build up and make the pipe gurgle. A properly made pipe never gurgles, and smokes cool and dry. A low end Savinelli can easily fit into the category. If I had to choose, I would go with an Italian mfg over a Danish. all day. I personally smoke American artisan made pipes almost exclusively and never deal with any kind of gurgle.